This church is dedicated to the patron saint of seafarers.

This slumbering beast honors the Bavarian soldiers who died in Greece during a 19th-century typhoid outbreak.

Step inside an ancient beehive tomb built for a mysterious cult hero.

This elaborate hole in the ground was built as a sacred site for an ancient civilization.

The titular "little arch" near this Italian resort is one of the most popular diving spots in the country.

Ancient cave tombs known as the "houses of fairies."

Packed with geological formations, an ancient river, and taxidermied seals, this overlooked coastal cave system is worth a spelunk.

Mysterious tombstones thought to be remnants of Atlantis.

At an estimated 3,800 years old, this olive tree is one of the oldest on earth.

Cooled, fractured lava formed this geometric rock feature.

The ruins of an ancient Roman tomb hidden in the basement of a trendy clothing store.

One of the greatest collections of coins in the world is housed in the former mansion of an archeological pioneer.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

Legend says this sacred tree was a gift from goddess Athena.

Legend says it was constructed with the destroyed pillar of an ancient Greek Temple.

An ancient octagonal weather station named for the eight Greek gods of wind.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

The ruined doorway is a portal to the building's turbulent and torturous past.

These artifacts were discovered during the construction of the airport, with some dating back to the Neolithic period.

The Vatican's secret porn-festooned bathroom was painted in erotic murals by one of the greatest artists of the Renaissance.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

Breathtaking and huge 430 year old maps of Italy.

The ruins of a 13th-century monastery that long served as a place of refuge from wars and raids.

This outcropping was once home to a medieval monastery destroyed during the Ottoman conquest.